<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>标签选择器</title>
    <style>
        h1 {
            color: red;
        }

        p {
            color: green;
        }
    </style>
</head>
<body>
<h1>极客学院</h1>
<p>Web前端</p>
<h1>工程师</h1>
</body>
</html>